package com.wdt.data.util;

import java.util.Random;

public class StrUtil {

    public static String getRandomString(int length){
        String str="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        Random random=new Random();
        StringBuffer sb=new StringBuffer();
        for(int i=0;i<length;i++){
            int number=random.nextInt(62);
            sb.append(str.charAt(number));
        }
        return sb.toString();
    }


    public static void main(String[] args) {
        System.out.println(getRandomString(16));
        System.out.println(getRandomString(32));
    }
}
